PG Drives Technology VR2 series, Operation And Installation Manual

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PG
DRIVES TECHNOLOGY
65
C
HAPTER
3 - P
ROGRAMMING
SK77898/2
Inhibit in Inhibit 3 Band 3
Each parameter can be set to yes or no.
Yes Means that particular actuator channel direction of movement will
be inhibited when the relevant inhibit input is in that band.
For example, If Actuator Channel 1 Up: Inhibit in Inhibit 2 Band 3 is set to yes, then
Actuator Channel 1 Up direction will be inhibited when the connection to Inhibit 2 is
of a resistance within the range of Band 3.
No Means that particular actuator channel direction of movement will
not be affected by the relevant inhibit/band combination.
For a more detailed example of actuator inhibits, refer to section 6.15.2.
6.14 Actuator Channel 2 Up Inhibit and Actuator Channel 2
Down Inhibit
This parameter operates in the same way as Actuator Channel 1 Up Inhibit and
Actuator Channel 1 Down Inhibit, as described in section 6.12.
6.15 Inhibit Examples
VR2 INHIBIT POSSIBLE SWITCH SET-UP
Inhibit 2 +
Inhibit 2 -
2K2
SW. 3
SW. 2
SW. 1
2K2
6.15.1 Speed Inhibit Examples
Application: A wheelchair is fitted with an elevating seat. As the seat raises, the
maximum speed is reduced to 50%, then 25% and a full drive inhibit occurs at
maximum height.
A circuit such as below is used.
When the seat is in the fully lowered position, all switches are closed and the electrical
resistance is a short-circuit or 0 Ohms. As the seat raises, SW1 opens giving 2.2KOhms,
then SW2 opens giving 4.4KOhms and at full height SW3 opens giving a complete
open-circuit
Programming would be as below.
Inhibit 2 Threshold Levels: